The objective of this first phase study was to know the landforms characteristic at landslide occurrences in the research area.
This research conducted with the field survey on landforms phenomena at the location of landslides occurrences. Landforms map was constructed from topographic map, geology map, and assisted by analysis Digital Elevation Modeling ( DEM).
The result shows that the research area has 14 landforms unit by 161 landslides occurrence. Landslide occurrences at the mountains of denudational of Formation Bemmelen (49 occurrences), in the mountain of intrusive andesitic ( 34 occurrences), and the foot-slope mountain of denudational of Formation Bemmelen ( 18 occurrences). The level of landslide vulnerability is distinguished by existence of progressively increased weathering zone and rock structure which parallel with the level inclination of the main slope.
Key word: landforms characteristic, landslides, soil development